Mack & Rita stars Elizabeth Lail (You) as Mackenzie, a disillusioned 30-something who is exhausted by societal demands and wishes to be as comfortable in her skin as her grandmother. While at her best friend’s bachelorette party, she stumbles into a “sound bath regression pod” and emerges as 70-year-old “Aunt Rita” (Diane Keaton), soon realizing that the acceptance she craves from those around her is unlikely to come as quickly.